Long spots on the face are considered to be caused by freckles, chloasma, seborrheic keratosis and other diseases, and more and more spots on the face are related to sun exposure, ageing and other factors. 1. Freckles: it occurs in females, and is an autosomal dominant disease, with various clinical manifestations, lesions can be dotted, rounded or irregular, light brown or dark brown in color, usually located in the exposed areas, especially the cheeks and nose, generally symmetrically distributed, and the spots can be increased or aggravated due to sun exposure. 2. Melasma: the etiology is not clear, it may be related to genetic susceptibility, ultraviolet radiation, hormone level changes, etc. Melasma patients may have light yellowish-brown or dark brown spots on exposed areas such as zygomatic bone prominence, upper lip, jaw, etc., and the pigmentation may deepen and the spots may increase after exposure to sunlight. 3. Seborrheic keratosis: It is caused by skin aging, and is also related to heredity and gene mutation, etc. The lesions can be distributed on the face, chest, back and other parts of the body, and are usually light yellow or light brown, which can gradually increase with age. Although spots on the face will not harm the human body, but may affect the aesthetics, if there is a need, you can go to the regular medical institutions, follow the doctor’s instructions for treatment, so as to lighten or remove the spots.